F2206 Power Combo Set is for mirco Racer 250 design.

F2204 Power Combo Set is for mirco Racer 250 design.

F1806 Power Combo Set is for 250mm size desing.

F1306 Power combo set is for 200mm mirco racer design.

F1104 Power Combo Set is special for DIY 130~160mm RACING QUAD design.

320 set is for Racer 320 design.